The Postfix queue is designed to be a short-term message store
where files can be located quickly based on their name alone.
I don't think it is a good idea to re-purpose this design for
routine long-term storage of messages waiting for approval, or to
break the design by making file locations dependent on properties
other than the file name.
I also don't think that re-injection queue files directly into the
queue is a good idea. Moving files back into the queue after
several days breaks more things than we discussed sofar.
For example, re-injected files will be past their expiration time.
This breaks another fundamental assumption of the queue file life
cycle, namely that there will be multiple delivery attempts before
a message expires. And you'd have the same problem with other MTAs.
If your infrastructure requires a review cycle, then it makes no
sense to keep that mail in the Postfix queue. The messages should
be given to a (web-based?) review system, and that system should
submit approved email via SMTP or /usr/sbin/sendmail to Postfix,
preserving the old contents and the old envelope sender/recipient.
Wietse
